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Chemosphere. 2017 Oct;185:888-898. doi: 10.1016/j.chemosphere.2017.07.099. Epub 2017 Jul 19.

Bioaccumulation, distribution and elimination of chlordecone in the giant freshwater prawn Macrobrachium rosenbergii: Field and laboratory studies.

Author information

1
University of Liège, Laboratory of Animal Ecology and Ecotoxicology (LEAE) - Freshwater and OceaniC sciences Unit of reSearch (FOCUS), Chemistry Institute, Bât. B6C, 11 allée du 6 Août, B-4000 Sart-Tilman, Belgium.
2
University of Liège, Laboratory of Animal Ecology and Ecotoxicology (LEAE) - Freshwater and OceaniC sciences Unit of reSearch (FOCUS), Chemistry Institute, Bât. B6C, 11 allée du 6 Août, B-4000 Sart-Tilman, Belgium. Electronic address: eric.gismondi@ulg.ac.be.
3
Normandie University, ULH, UMR I-02, Environmental Stresses and Biomonitoring of Aquatic Ecosystems (SEBIO) - FR CNRS 3730 SCALE, 25 rue Philippe Lebon, F-76600 Le Havre, France.
4
UMR BOREA, CNRS-7208/MNHN/UPMC/IRD-207/UCN/UA, University of the French West Indies and Guiana, Campus de Fouillole, F-97110 Pointe-à-Pitre, France; INRA, UMR0985 Ecology and Ecosystem Health Research Unit, Ecotoxicology and Quality of Aquatic Environments Research Group, 65 rue de Saint Brieuc, F-35042 Rennes, France.
5
UMR BOREA, CNRS-7208/MNHN/UPMC/IRD-207/UCN/UA, University of the French West Indies and Guiana, Campus de Fouillole, F-97110 Pointe-à-Pitre, France.
6
INRA, UMR0985 Ecology and Ecosystem Health Research Unit, Ecotoxicology and Quality of Aquatic Environments Research Group, 65 rue de Saint Brieuc, F-35042 Rennes, France.

Abstract

Chlordecone is a persistent organochlorine pesticide that has been widely used in Guadeloupe (French West Indies) to control the banana weevil Cosmopolites sordidus from 1972 to 1993. A few years after its introduction, widespread contamination of soils, rivers, wild animals and aquatic organisms was reported. Although high chlordecone concentrations have been reported in several crustacean species, its uptake, internal distribution, and elimination in aquatic species have never been described. This study aimed at investigating the accumulation and tissue distribution of chlordecone in the giant freshwater prawn Macrobrachium rosenbergii, using both laboratory (30 days exposure) and field (8 months exposure) approaches. In addition, depuration in chlordecone-free water was studied. Results showed that chlordecone bioconcentration in prawns was dose-dependent and time-dependent. Moreover, females appeared to be less contaminated than males after 5 and 7 months of exposure, probably due to successive spawning leading in the elimination of chlordecone through the eggs. Chlordecone distribution in tissues of exposed prawns showed that cephalothorax organs, mainly represented by the hepatopancreas, was the most contaminated. Results also showed that chlordecone was accumulated in cuticle, up to levels of 40% of the chlordecone body burden, which could be considered as a depuration mechanism since chlordecone is eliminated with the exuviae during successive moults. Finally, this study underlined the similarity of results obtained in laboratory and field approaches, which highlights their complementarities in the chlordecone behaviour understanding in M. rosenbergii.

KEYWORDS:

Bioaccumulation; Bioaccumulation factor; Chlordecone; Elimination; Macrobrachium rosenbergii; Organochlorine

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